Blow-off device for domestic boilers.



'J'. MANNESGHMIDT, JR- BLOW-OFF DEVICE FOR DOMESTIC BOILERS.

APPLIOATION FILED MAR. 8, 1907.

Patented Sept. 29, 1908.

Wiinesse a.

J r., a citizen of the United States, residing in QIAO'OB: MANNESGHMIDT, In, or BROOKLYN,NEW YORK.

g BLOW-OFF DEVICE non DOMESTIC BOILERS.

Specification of Letters Patent.

Patented Sept. 29, 1908.

' Application filed. March a, 1907. Serial No. 361,353.

To all whom it may concern:

Be it known that I, JACOB MANNESCHMIDT,

the borough of Brooklyn, in the county of Kings and State of New York, have invented a certain new and useful Improvement in Blow-Off Devices for Domestic Boilers, of which the followingis a specification, reference being had therein tothe accompanying drawings, forming a part thereof;

My invention relates to blow-off devices for domestic boilers and has for its objects simplicity and compactness of construction, ease of operation in blowing-off or draining the boiler, ready removal of the valve for access to the interior of the device and ready attachment and removal-of the entire device.

Other objects of my invention will appear from the following description of the embodiment of my invention shown in the accompanying drawings.

I will now particularly describe such construction and will thereafter point out my invention in claims. I

Figure 1 is a vertical partly sectional view of the blow-off device attached to the bottom of a range boiler. Fig. 2 is a similar view of the blow-off device, but with the valve removed for access to theinterior of the device. Fig. 3 is an end elevation of the same partly in section on a plane indicated by the line 33, Fig. 2. 7

The blow-0E device comprises a casing 4, the upper part of which is adapted to be connected to the boiler bottom 5, as by a ta pered threaded portion 2 screwed into such ottom as shown; and this casing has a lateral extension 10 adapted to be connected to the supply-pipe 6 for the water-back, such connection being shown as formed by a coupling nut 7 threaded upon the extension of the blow-off device and clamping the end of the supply-pipe. The casing also has a drain extension 8, extending obliquely downward and shown as externally threaded at its lower end so that a drain-pipe may be coupled orconnected to it ifit is undesirable to discharge its contents directly into a receptacle. Communication to the drain extension 8 from the other parts of the device is normally prevented by a removable valve located in a lateral extension 9 of the casing,

this lateral extension 9 beingarranged oppo-.

sitely to the lateral extension 10 for'the water-back supplypipe connection. Thisfaced with a suitable soft or elastic material and having a stem 13 which is threaded into a removable sleeve 14 and extends outward V through a cap 15 and has at its outer end an operating handle 16. The removable sleeve 14 is flanged at its outer end and its flange is clamped against the casing, with interposed gaskets, by the cap 15.

a The valve may be operated at any time to open communication fromthe other parts of the device to the drain extension 8, as is desirable to drain the boiler, and will not only effect the drair'iage of the boiler but also the drainage of the water-back through the waterback supply-pipe 6, or, as it is usually termed, because of the formation of sediment therein, the sediment pipe. Thus the boiler and water-back may be readily and completely drained, unless sediment or incrustation shall have so obstructed the entrance to the valve seat 12 that water cannot flow therethrough. When this condition exists, the blow-off valve may be completely removed by unscrewing the cap 15 and pulling out the valve and its threaded thimble, and then a tool may be readily inserted through the opening thus formed to break away not only the sediment or inorustation which obstructs the drain opening but also any sediment or incrustation which may be lodged or formed in the supply-pipe extension 10 or in the supplypipe itself. Thus a complete cleaning out of the portions of the system wherein the sediment collects may be effected withoutdisturbing any of the permanent joints or connections of the system.

Should an emergency arise wherein it is necessary to remove the blow-off device for access to the interior of the boiler, the coupling to the pipe 6 may be disconnected and there will then be no impediment to the un- As, how-- screwing of. the blow-off device. ever, the lower parts of this device are preferably of thin metal and liable to distortion if subjected to great pressure, I form a flatsided portion 17 upon the body of the casing of the blow-off device, so that this flat-sided portion may be engaged by a suitable wrench whenever it is desired to detach or attach the blow-off device from or to the boiler, this flat-sided portion being located in proximity to the threaded portion 2 which screws into the boiler but at a sufficient distance therefrom so that a nut or wrench may be conveniently applied to it. It will be noted that the drainage part is normally out of communication with the system and that all parts normally in communication are ex posed to the current of water which, in the operation of the boiler and water-back, flows downward through the casing and outward through the water-back supply-pipe. It will also be noted that when the drain is opened, the valve may be unscrewed back against the inner end of the threaded sleeve so as to offer no obstruction to the drainage and at the same time seal its thread and stem from the drainage water.

It is obvious that various modifications may be made in the construction shown and above particularly described within the prin ciple and scope of my invention.

1 claim:

A blow-oil device for domestic boilers comprising an integral casing provided with means at its upper end for connection with the bottom of a boiler and provided with means for lateral connection with a waterback supply pipe, the casing having a passage therein from the boiler connection to the lateral water-back supply pipe connection and having a drain outlet in the wall ol the passage opposite the lateral connection and having a valve chamber opposite to and sub stantially in line with the lateral connection and connected with the passage by the drain outlet, and the casing also having a downward drain extension connected to the passage by the drain outlet, and a valve located in the valve chamber and arranged to close the drain outlet and being bodily removable from the casing, substantially as set forth.

In testimony whereof I have allixed my signature in presence of two witnesses.

JACOB MANNESCHMID'I, JR.

Witnesses HENRY D. VVILLIAMS, BERNARD Comm. 

